http://xmlgraphics.apache.org/commons/: Apache XML Graphics Commons is a library that consists of several reusable components used by Apache Batik and Apache FOP. Many of these components can easily be used separately outside the domains of SVG and XSL-FO. (Apache Software Foundation) 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id: DefaultGraphics2D.java 1732018 2016-02-24 04:51:06Z gadams $ */

package org.apache.xmlgraphics.java2d;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.RenderableImage;
import java.text.AttributedCharacterIterator;

// CSOFF: WhitespaceAround


This concrete implementation of AbstractGraphics2D is a
simple help to programmers to get started with their own
implementation of Graphics2D.
DefaultGraphics2D implements all the abstract methods
is AbstractGraphics2D and makes it easy to start
implementing a Graphic2D piece-meal.

See Also:
Version:$Id: DefaultGraphics2D.java 1732018 2016-02-24 04:51:06Z gadams $
/**
 * This concrete implementation of <tt>AbstractGraphics2D</tt> is a
 * simple help to programmers to get started with their own
 * implementation of <tt>Graphics2D</tt>.
 * <tt>DefaultGraphics2D</tt> implements all the abstract methods
 * is <tt>AbstractGraphics2D</tt> and makes it easy to start
 * implementing a <tt>Graphic2D</tt> piece-meal.
 *
 * @version $Id: DefaultGraphics2D.java 1732018 2016-02-24 04:51:06Z gadams $
 * @see org.apache.xmlgraphics.java2d.AbstractGraphics2D
 *
 * Originally authored by Vincent Hardy.
 */
public class DefaultGraphics2D extends AbstractGraphics2D {
    
Default constructor

/**
     * Default constructor
     */
    public DefaultGraphics2D(boolean textAsShapes) {
        super(textAsShapes);
    }

    
This constructor supports the create method

/**
     * This constructor supports the create method
     */
    public DefaultGraphics2D(DefaultGraphics2D g) {
        super(g);
    }

    
Creates a new Graphics object that is
a copy of this Graphics object.

Returns:    a new graphics context that is a copy of
            this graphics context.
/**
     * Creates a new <code>Graphics</code> object that is
     * a copy of this <code>Graphics</code> object.
     * @return     a new graphics context that is a copy of
     *             this graphics context.
     */
    public Graphics create() {
        return new DefaultGraphics2D(this);
    }

    
Draws as much of the specified image as is currently available.
The image is drawn with its top-left corner at
(x, y) in this graphics context's coordinate
space. Transparent pixels in the image do not affect whatever
pixels are already there.


This method returns immediately in all cases, even if the
complete image has not yet been loaded, and it has not been dithered
and converted for the current output device.


If the image has not yet been completely loaded, then
drawImage returns false. As more of
the image becomes available, the process that draws the image notifies
the specified image observer.

Params:
  • img – the specified image to be drawn.
  • x –   the x coordinate.
  • y –   the y coordinate.
  • observer –    object to be notified as more of
                         the image is converted.
See Also:
/**
     * Draws as much of the specified image as is currently available.
     * The image is drawn with its top-left corner at
     * (<i>x</i>,&nbsp;<i>y</i>) in this graphics context's coordinate
     * space. Transparent pixels in the image do not affect whatever
     * pixels are already there.
     * <p>
     * This method returns immediately in all cases, even if the
     * complete image has not yet been loaded, and it has not been dithered
     * and converted for the current output device.
     * <p>
     * If the image has not yet been completely loaded, then
     * <code>drawImage</code> returns <code>false</code>. As more of
     * the image becomes available, the process that draws the image notifies
     * the specified image observer.
     * @param    img the specified image to be drawn.
     * @param    x   the <i>x</i> coordinate.
     * @param    y   the <i>y</i> coordinate.
     * @param    observer    object to be notified as more of
     *                          the image is converted.
     * @see      java.awt.Image
     * @see      java.awt.image.ImageObserver
     * @see      java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
     */
    public boolean drawImage(Image img, int x, int y, ImageObserver observer) {
        System.err.println("drawImage");
        return true;
    }

    
Draws as much of the specified image as has already been scaled
to fit inside the specified rectangle.


The image is drawn inside the specified rectangle of this
graphics context's coordinate space, and is scaled if
necessary. Transparent pixels do not affect whatever pixels
are already there.


This method returns immediately in all cases, even if the
entire image has not yet been scaled, dithered, and converted
for the current output device.
If the current output representation is not yet complete, then
drawImage returns false. As more of
the image becomes available, the process that draws the image notifies
the image observer by calling its imageUpdate method.


A scaled version of an image will not necessarily be
available immediately just because an unscaled version of the
image has been constructed for this output device.  Each size of
the image may be cached separately and generated from the original
data in a separate image production sequence.

Params:
  • img –    the specified image to be drawn.
  • x –      the x coordinate.
  • y –      the y coordinate.
  • width –  the width of the rectangle.
  • height – the height of the rectangle.
  • observer –    object to be notified as more of
                         the image is converted.
See Also:
/**
     * Draws as much of the specified image as has already been scaled
     * to fit inside the specified rectangle.
     * <p>
     * The image is drawn inside the specified rectangle of this
     * graphics context's coordinate space, and is scaled if
     * necessary. Transparent pixels do not affect whatever pixels
     * are already there.
     * <p>
     * This method returns immediately in all cases, even if the
     * entire image has not yet been scaled, dithered, and converted
     * for the current output device.
     * If the current output representation is not yet complete, then
     * <code>drawImage</code> returns <code>false</code>. As more of
     * the image becomes available, the process that draws the image notifies
     * the image observer by calling its <code>imageUpdate</code> method.
     * <p>
     * A scaled version of an image will not necessarily be
     * available immediately just because an unscaled version of the
     * image has been constructed for this output device.  Each size of
     * the image may be cached separately and generated from the original
     * data in a separate image production sequence.
     * @param    img    the specified image to be drawn.
     * @param    x      the <i>x</i> coordinate.
     * @param    y      the <i>y</i> coordinate.
     * @param    width  the width of the rectangle.
     * @param    height the height of the rectangle.
     * @param    observer    object to be notified as more of
     *                          the image is converted.
     * @see      java.awt.Image
     * @see      java.awt.image.ImageObserver
     * @see      java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
     */
    public boolean drawImage(Image img, int x, int y,
                             int width, int height,
                             ImageObserver observer) {
        System.out.println("drawImage");
        return true;
    }

    
Disposes of this graphics context and releases
any system resources that it is using.
A Graphics object cannot be used after
disposehas been called.


When a Java program runs, a large number of Graphics
objects can be created within a short time frame.
Although the finalization process of the garbage collector
also disposes of the same system resources, it is preferable
to manually free the associated resources by calling this
method rather than to rely on a finalization process which
may not run to completion for a long period of time.


Graphics objects which are provided as arguments to the
paint and update methods
of components are automatically released by the system when
those methods return. For efficiency, programmers should
call dispose when finished using
a Graphics object only if it was created
directly from a component or another Graphics object.

See Also:
/**
     * Disposes of this graphics context and releases
     * any system resources that it is using.
     * A <code>Graphics</code> object cannot be used after
     * <code>dispose</code>has been called.
     * <p>
     * When a Java program runs, a large number of <code>Graphics</code>
     * objects can be created within a short time frame.
     * Although the finalization process of the garbage collector
     * also disposes of the same system resources, it is preferable
     * to manually free the associated resources by calling this
     * method rather than to rely on a finalization process which
     * may not run to completion for a long period of time.
     * <p>
     * Graphics objects which are provided as arguments to the
     * <code>paint</code> and <code>update</code> methods
     * of components are automatically released by the system when
     * those methods return. For efficiency, programmers should
     * call <code>dispose</code> when finished using
     * a <code>Graphics</code> object only if it was created
     * directly from a component or another <code>Graphics</code> object.
     * @see         java.awt.Graphics#finalize
     * @see         java.awt.Component#paint
     * @see         java.awt.Component#update
     * @see         java.awt.Component#getGraphics
     * @see         java.awt.Graphics#create()
     */
    public void dispose() {
        System.out.println("dispose");
    }

    
Strokes the outline of a Shape using the settings of the
current Graphics2D context.  The rendering attributes
applied include the Clip, Transform,
Paint, Composite and
Stroke attributes.

Params:
  • s – the Shape to be rendered
See Also:
/**
     * Strokes the outline of a <code>Shape</code> using the settings of the
     * current <code>Graphics2D</code> context.  The rendering attributes
     * applied include the <code>Clip</code>, <code>Transform</code>,
     * <code>Paint</code>, <code>Composite</code> and
     * <code>Stroke</code> attributes.
     * @param s the <code>Shape</code> to be rendered
     * @see #setStroke(java.awt.Stroke)
     * @see #setPaint(java.awt.Paint)
     * @see java.awt.Graphics#setColor
     * @see #setTransform(AffineTransform)
     * @see #setClip(Shape)
     * @see #setComposite(java.awt.Composite)
     */
    public void draw(Shape s) {
        System.out.println("draw(Shape)");
    }

    
Renders a RenderedImage, applying a transform from image space into user space before drawing. The transformation from user space into device space is done with the current Transform in the Graphics2D.
The specified transformation is applied to the image before the
transform attribute in the Graphics2D context is applied.
The rendering attributes applied include the Clip,
Transform, and Composite attributes. Note
that no rendering is done if the specified transform is
noninvertible.

Params:
  • img – the image to be rendered
  • xform – the transformation from image space into user space
See Also:
/**
     * Renders a {@link RenderedImage},
     * applying a transform from image
     * space into user space before drawing.
     * The transformation from user space into device space is done with
     * the current <code>Transform</code> in the <code>Graphics2D</code>.
     * The specified transformation is applied to the image before the
     * transform attribute in the <code>Graphics2D</code> context is applied.
     * The rendering attributes applied include the <code>Clip</code>,
     * <code>Transform</code>, and <code>Composite</code> attributes. Note
     * that no rendering is done if the specified transform is
     * noninvertible.
     * @param img the image to be rendered
     * @param xform the transformation from image space into user space
     * @see #setTransform(AffineTransform)
     * @see #setComposite(java.awt.Composite)
     * @see #setClip(Shape)
     */
    public void drawRenderedImage(RenderedImage img,
                                  AffineTransform xform) {
        System.out.println("drawRenderedImage");
    }


    
Renders a RenderableImage, applying a transform from image space into user space before drawing. The transformation from user space into device space is done with the current Transform in the Graphics2D.
The specified transformation is applied to the image before the
transform attribute in the Graphics2D context is applied.
The rendering attributes applied include the Clip,
Transform, and Composite attributes. Note
that no rendering is done if the specified transform is
noninvertible.


Rendering hints set on the Graphics2D object might
be used in rendering the RenderableImage.
If explicit control is required over specific hints recognized by a
specific RenderableImage, or if knowledge of which hints
are used is required, then a RenderedImage should be
obtained directly from the RenderableImage and rendered using drawRenderedImage. 
Params:
  • img – the image to be rendered
  • xform – the transformation from image space into user space
See Also:
/**
     * Renders a
     * {@link RenderableImage},
     * applying a transform from image space into user space before drawing.
     * The transformation from user space into device space is done with
     * the current <code>Transform</code> in the <code>Graphics2D</code>.
     * The specified transformation is applied to the image before the
     * transform attribute in the <code>Graphics2D</code> context is applied.
     * The rendering attributes applied include the <code>Clip</code>,
     * <code>Transform</code>, and <code>Composite</code> attributes. Note
     * that no rendering is done if the specified transform is
     * noninvertible.
     *<p>
     * Rendering hints set on the <code>Graphics2D</code> object might
     * be used in rendering the <code>RenderableImage</code>.
     * If explicit control is required over specific hints recognized by a
     * specific <code>RenderableImage</code>, or if knowledge of which hints
     * are used is required, then a <code>RenderedImage</code> should be
     * obtained directly from the <code>RenderableImage</code>
     * and rendered using
     *{@link #drawRenderedImage(RenderedImage, AffineTransform) drawRenderedImage}.
     * @param img the image to be rendered
     * @param xform the transformation from image space into user space
     * @see #setTransform(AffineTransform)
     * @see #setComposite(java.awt.Composite)
     * @see #setClip(Shape)
     * @see #drawRenderedImage
     */
     public void drawRenderableImage(RenderableImage img,
                                     AffineTransform xform) {
         System.out.println("drawRenderableImage");
     }

    
Renders the text specified by the specified String,
using the current Font and Paint attributes
in the Graphics2D context.
The baseline of the first character is at position
(x, y) in the User Space.
The rendering attributes applied include the Clip,
Transform, Paint, Font and
Composite attributes. For characters in script systems
such as Hebrew and Arabic, the glyphs can be rendered from right to
left, in which case the coordinate supplied is the location of the
leftmost character on the baseline.

Params:
  • s – the String to be rendered
  • x – the x coordinate where the String should be
         rendered
  • y – the y coordinate where the String should be
         rendered
See Also:
/**
     * Renders the text specified by the specified <code>String</code>,
     * using the current <code>Font</code> and <code>Paint</code> attributes
     * in the <code>Graphics2D</code> context.
     * The baseline of the first character is at position
     * (<i>x</i>,&nbsp;<i>y</i>) in the User Space.
     * The rendering attributes applied include the <code>Clip</code>,
     * <code>Transform</code>, <code>Paint</code>, <code>Font</code> and
     * <code>Composite</code> attributes. For characters in script systems
     * such as Hebrew and Arabic, the glyphs can be rendered from right to
     * left, in which case the coordinate supplied is the location of the
     * leftmost character on the baseline.
     * @param s the <code>String</code> to be rendered
     * @param x the x coordinate where the <code>String</code> should be
     *          rendered
     * @param y the y coordinate where the <code>String</code> should be
     *          rendered
     * @see #setPaint(java.awt.Paint)
     * @see java.awt.Graphics#setColor
     * @see java.awt.Graphics#setFont
     * @see #setTransform(AffineTransform)
     * @see #setComposite(java.awt.Composite)
     * @see #setClip(Shape)
     */
    public void drawString(String s, float x, float y) {
        System.out.println("drawString(String)");
    }

    
Renders the text of the specified iterator, using the
Graphics2D context's current Paint. The
iterator must specify a font
for each character. The baseline of the
first character is at position (x, y) in the
User Space.
The rendering attributes applied include the Clip,
Transform, Paint, and
Composite attributes.
For characters in script systems such as Hebrew and Arabic,
the glyphs can be rendered from right to left, in which case the
coordinate supplied is the location of the leftmost character
on the baseline.

Params:
  • iterator – the iterator whose text is to be rendered
  • x – the x coordinate where the iterator's text is to be rendered
  • y – the y coordinate where the iterator's text is to be rendered
See Also:
/**
     * Renders the text of the specified iterator, using the
     * <code>Graphics2D</code> context's current <code>Paint</code>. The
     * iterator must specify a font
     * for each character. The baseline of the
     * first character is at position (<i>x</i>,&nbsp;<i>y</i>) in the
     * User Space.
     * The rendering attributes applied include the <code>Clip</code>,
     * <code>Transform</code>, <code>Paint</code>, and
     * <code>Composite</code> attributes.
     * For characters in script systems such as Hebrew and Arabic,
     * the glyphs can be rendered from right to left, in which case the
     * coordinate supplied is the location of the leftmost character
     * on the baseline.
     * @param iterator the iterator whose text is to be rendered
     * @param x the x coordinate where the iterator's text is to be rendered
     * @param y the y coordinate where the iterator's text is to be rendered
     * @see #setPaint(java.awt.Paint)
     * @see java.awt.Graphics#setColor
     * @see #setTransform(AffineTransform)
     * @see #setComposite(java.awt.Composite)
     * @see #setClip(Shape)
     */
     public void drawString(AttributedCharacterIterator iterator,
                            float x, float y) {
         System.err.println("drawString(AttributedCharacterIterator)");
     }



    
Fills the interior of a Shape using the settings of the
Graphics2D context. The rendering attributes applied
include the Clip, Transform,
Paint, and Composite.

Params:
  • s – the Shape to be filled
See Also:
/**
     * Fills the interior of a <code>Shape</code> using the settings of the
     * <code>Graphics2D</code> context. The rendering attributes applied
     * include the <code>Clip</code>, <code>Transform</code>,
     * <code>Paint</code>, and <code>Composite</code>.
     * @param s the <code>Shape</code> to be filled
     * @see #setPaint(java.awt.Paint)
     * @see java.awt.Graphics#setColor
     * @see #setTransform(AffineTransform)
     * @see #setComposite(java.awt.Composite)
     * @see #setClip(Shape)
     */
    public void fill(Shape s) {
        System.err.println("fill");
    }

    
Returns the device configuration associated with this
Graphics2D.

/**
     * Returns the device configuration associated with this
     * <code>Graphics2D</code>.
     */
    public GraphicsConfiguration getDeviceConfiguration() {
        System.out.println("getDeviceConviguration");
        return null;
    }

    
Used to create proper font metrics

/**
     * Used to create proper font metrics
     */
    private Graphics2D fmg;

    {
        BufferedImage bi
            = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);

        fmg = bi.createGraphics();
    }

    
Gets the font metrics for the specified font.

Params:
  • f – the specified font
See Also:
Returns:   the font metrics for the specified font.
/**
     * Gets the font metrics for the specified font.
     * @return    the font metrics for the specified font.
     * @param     f the specified font
     * @see       java.awt.Graphics#getFont
     * @see       java.awt.FontMetrics
     * @see       java.awt.Graphics#getFontMetrics()
     */
    public FontMetrics getFontMetrics(Font f) {
        return fmg.getFontMetrics(f);
    }

    
Sets the paint mode of this graphics context to alternate between
this graphics context's current color and the new specified color.
This specifies that logical pixel operations are performed in the
XOR mode, which alternates pixels between the current color and
a specified XOR color.


When drawing operations are performed, pixels which are the
current color are changed to the specified color, and vice versa.


Pixels that are of colors other than those two colors are changed
in an unpredictable but reversible manner; if the same figure is
drawn twice, then all pixels are restored to their original values.

Params:
  • c1 – the XOR alternation color
/**
     * Sets the paint mode of this graphics context to alternate between
     * this graphics context's current color and the new specified color.
     * This specifies that logical pixel operations are performed in the
     * XOR mode, which alternates pixels between the current color and
     * a specified XOR color.
     * <p>
     * When drawing operations are performed, pixels which are the
     * current color are changed to the specified color, and vice versa.
     * <p>
     * Pixels that are of colors other than those two colors are changed
     * in an unpredictable but reversible manner; if the same figure is
     * drawn twice, then all pixels are restored to their original values.
     * @param     c1 the XOR alternation color
     */
    public void setXORMode(Color c1) {
        System.out.println("setXORMode");
    }


    
Copies an area of the component by a distance specified by
dx and dy. From the point specified
by x and y, this method
copies downwards and to the right.  To copy an area of the
component to the left or upwards, specify a negative value for
dx or dy.
If a portion of the source rectangle lies outside the bounds
of the component, or is obscured by another window or component,
copyArea will be unable to copy the associated
pixels. The area that is omitted can be refreshed by calling
the component's paint method.

Params:
  • x – the x coordinate of the source rectangle.
  • y – the y coordinate of the source rectangle.
  • width – the width of the source rectangle.
  • height – the height of the source rectangle.
  • dx – the horizontal distance to copy the pixels.
  • dy – the vertical distance to copy the pixels.
/**
     * Copies an area of the component by a distance specified by
     * <code>dx</code> and <code>dy</code>. From the point specified
     * by <code>x</code> and <code>y</code>, this method
     * copies downwards and to the right.  To copy an area of the
     * component to the left or upwards, specify a negative value for
     * <code>dx</code> or <code>dy</code>.
     * If a portion of the source rectangle lies outside the bounds
     * of the component, or is obscured by another window or component,
     * <code>copyArea</code> will be unable to copy the associated
     * pixels. The area that is omitted can be refreshed by calling
     * the component's <code>paint</code> method.
     * @param       x the <i>x</i> coordinate of the source rectangle.
     * @param       y the <i>y</i> coordinate of the source rectangle.
     * @param       width the width of the source rectangle.
     * @param       height the height of the source rectangle.
     * @param       dx the horizontal distance to copy the pixels.
     * @param       dy the vertical distance to copy the pixels.
     */
    public void copyArea(int x, int y, int width, int height,
                         int dx, int dy) {
        System.out.println("copyArea");
    }

}